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| 型号： | LT1787IS8#TRPBF |
| 厂商： | Linear Technology |
| 文件页数： | 16/16页 |
| 文件大小： | 0K |
| 描述： | IC AMP PREC CURRENT SENSE 8SOIC |
| 标准包装： | 2,500 |
| 放大器类型： | 电流检测 |
| 电路数： | 1 |
| 电压 - 输入偏移： | 40µV |
| 电流 - 电源： | 60µA |
| 电流 - 输出 / 通道： | 50µA |
| 电压 - 电源，单路/双路(±)： | 2.5 V ~ 36 V，±1.25 V ~ 18 V |
| 工作温度： | -40°C ~ 125°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 8-SOIC（0.154"，3.90mm 宽） |
| 供应商设备封装： | 8-SO |
| 包装： | 带卷 (TR) |
9
LT1787/LT1787HV
1787fc
PIN FUNCTIONS
UU
U
FIL–, FIL+ (Pins 1, 8): Negative and Positive Filter Termi-
nals. Differential mode noise can be filtered by connecting
a capacitor across FIL– and FIL+. Pole frequency
f–3dB = 1/(2πRC), R = 1.25k.
VS– (Pin 2): Negative Input Sense Terminal. Negative
sense voltage will result in an output sinking current
proportional to the sense current. VS– is connected to an
internal gain-setting resistor RG1A and supplies bias cur-
rent to the internal amplifier.
DNC (Pin 3): Do Not Connect. Connected internally. Do not
connect external circuitry to this pin.
VEE (Pin 4): Negative Supply or Ground for Single Supply
Operation.
VOUT (Pin 5): Voltage Output or Current Output propor-
tional to the magnitude of the sense current flowing
through RSENSE. For bidirectional current sensing opera-
tion, VOUT = AV VSENSE + VOUT(O) + VBIAS,
where:
VOUT > VBIAS for VS+ > VS–
VOUT < VBIAS for VS+ < VS–
VOUT(O) is the no load output voltage at VSENSE = 0V.
VBIAS (Pin 6): Output Bias Pin. For single supply, bidirec-
tional current sensing operation, VBIAS is connected to an
external bias voltage, so that at VSENSE = 0V, VOUT =
VOUT(O) + VBIAS. For dual supply, bidirectional current
sensing operation, VBIAS is connected to ground. Thus,
VOUT = VOUT(O) at VSENSE = 0V.
VS+ (Pin 7): Positive Input Sense Terminal. Positive sense
voltage will result in an output sourcing current propor-
tional to the sense current. VS+ is connected to an internal
gain-setting resistor RG2A. Connecting a supply to VS+ and
a load to VS– will allow the LT1787 to measure its own
supply current.
BLOCK DIAGRAM
W
RSENSE
1787 F 01
RG2A
1.25k
RG2B
1.25k
RG1A
1.25k
RG1B
1.25k
VOUT
IOUT
VBIAS
ROUT
20k
VS
–
+
A1
Q1
Q2
CURRENT MIRROR
VEE
FIL–
VS
+
FIL+
ISENSE
Figure 1. LT1787 Functional Diagram
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相关代理商/技术参数 |
参数描述 |
|---|---|
| LT1789-1 | 制造商:LINER 制造商全称:Linear Technology 功能描述:Micropower, Single Supply Rail-to-Rail Output Instrumentation Amplifiers |
| LT1789-1_1 | 制造商:LINER 制造商全称:Linear Technology 功能描述:Micropower, Single Supply Rail-to-Rail Output Instrumentation Amplifiers |
| LT1789-10 | 制造商:LINER 制造商全称:Linear Technology 功能描述:Micropower, Single Supply Rail-to-Rail Output Instrumentation Amplifiers |
| LT1789CS8-1 | 功能描述:IC INSTRUMENT AMP R-R OUT 8-SOIC RoHS:否 类别:集成电路 (IC) >> Linear - Amplifiers - Instrumentation 系列:- 标准包装:2,500 系列:Excalibur™ 放大器类型:J-FET 电路数:1 输出类型:- 转换速率:45 V/µs 增益带宽积:10MHz -3db带宽:- 电流 - 输入偏压:20pA 电压 - 输入偏移:490µV 电流 - 电源:1.7mA 电流 - 输出 / 通道:48mA 电压 - 电源，单路/双路(±):4.5 V ~ 38 V，±2.25 V ~ 19 V 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:8-SOIC（0.154"，3.90mm 宽） 供应商设备封装:8-SOIC 包装:带卷 (TR) |
| LT1789CS8-1#PBF | 功能描述:IC INSTRUMENT AMP R-R OUT 8-SOIC RoHS:是 类别:集成电路 (IC) >> Linear - Amplifiers - Instrumentation 系列:- 标准包装:2,500 系列:- 放大器类型:通用 电路数:4 输出类型:- 转换速率:0.6 V/µs 增益带宽积:1MHz -3db带宽:- 电流 - 输入偏压:45nA 电压 - 输入偏移:2000µV 电流 - 电源:1.4mA 电流 - 输出 / 通道:40mA 电压 - 电源，单路/双路(±):3 V ~ 32 V，±1.5 V ~ 16 V 工作温度:0°C ~ 70°C 安装类型:表面贴装 封装/外壳:14-TSSOP（0.173"，4.40mm 宽） 供应商设备封装:14-TSSOP 包装:带卷 (TR) 其它名称:LM324ADTBR2G-NDLM324ADTBR2GOSTR |
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